Note : Les descriptions sont présentées dans la langue officielle dans laquelle elles ont été soumises.
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WRAP FOR ST$RILE ARTICLES
Lloyd A. Cox
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TECHNICAL FIELD
. This invention relates to a wrap for
enclosing an article before and after sterilization
and until use. More particularly it is suitable for
wrapping folded surgical gowns and drapes.
BACKGROUND ART ~
In the past sterile articles including surgical -
drapes and gowns have been folded and then wrapped prior
to sterilization, with a sheet of paper or fabric folded
around the article in what is known as triangular fold.
An example of a triangularly folded wrap can be found in
U.S. P-tent 4,051,845 issued to Coilins on October 4, -
1977, Figures 1-5~
The prior art also includes so~e packages for
sterile articles which are rectangularly folded. By
rectangularly folded it is meant that an edge of a
starting sheet is folded over the item around a fold
line parallel to the edge being folded. A rectangular
wrap, as used herein, refers to a package formed from a
20 rectangular sheet solely by rectangular folds. In U.~. -
Patent 4,099,614 issued to Heissenberger on July 11, 1978
a rectangularly wrapped glove p`ackage is disclosed which
is said to be easily automated. U.S. Patent 3,148,771
issued on September 15, 1964 to Miller and U.S. Patent
25 3,119,495 issued on January 28, 19~4 to Pratt also
dis~lose rectangularly wrapped sterile articles. The
Pratt and Miller packages use adhesive to secure the sides
closed. The packages are unwrapped by pulling flaps
which are folded into the wrap.
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It has long been a goal in the field of -~
packaging of sterile articles to provlde a wrap~;
which is easily accomplished and easily removed without
contaminating the sterile contents by touching the~
5 or reaching into the sterile field during unwrapping. i-
The sterile field, as used herein, is descriptive of
a region of space during a period of time. More --
specifically, it is the region of space above a sterile ---
sur~ace for the period of time which the surface is :
exposed beneath the space, and for a short time prior
to its exposure. Refraining from entering the sterile j-~
field with non-sterile objects, insures that airborne ,-~
contamination will not be released at a time and location --
which make it probable that the contaminants will settle
15 on a sterile surface. -~
The triangularly folded wraps fail in that
they are not easily adapted to mechanized folding, involve
extra unwrapping steps ar.d require that the unwrapper ~`
reach into the sterile field or turn the package to
avoid reaching into the sterile field. Turning the
package or reaching into the sterile field or moving to -"
a different position to avoid reaching into the field or ~
turning the product is inconvenient and results in :`
excessive air movement which is cond~cive zo developing -`
airborne contamination in the sterile field which may
settle on the sterile article. -
The prior rectangularly folded packages also
require the unwrapper to reach into the sterile field.
In addition, the pouches of Pratt and Miller are not
30 amenable to removal of contents without contact.,~
.
DISCLOSURE OF THE INVENTION
- . .
This invention relates to a wrap for a
sterile article which permits unfolding of the wrap -
from one side without reaching into the article's
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sterile field. The wrap has a bottom panel with top,
botto~ and side edges which is situated underneath t~e
sterile article. The wrap also includes a first panel
folded inwardly on a first fold line corresponding to ~L,
the top edge of the bottom panel with the first fold
line corresponding to the top edge of the first panel. ~--
The first panel is superimposed atop the article and ---
the bottom panel. The wrap also includes a second ~-
panel folded outwardly on a second fold line corres-
10 ponding to the bottom edge of the first panel. The ,-~
second panel is superimposed over the first panel with
the bottom edge of the second panel corresponding to
i the second fold line. A third panel is folded underneath `-
the bottom panel on a third fold line corresponding to -
15 the top edge of the second panel with the top edge ---
corresponding to the third fold line. Finally, a -
fourth panel is folded inwardly atop the sterile
article on a fourth fold line corresponding to the .~
bottom edge of the bottom panel so that the fourth l -
panel is superimposed on top of the article and the
bottom panel~
BRIEF DESCRIPTION OF DRAWINGS -
Figure 1 is an elevated perspective view of ---
the sterile article and the wrap of the present
25 invention before the article is wrapped. ---
Figure 2 is an elevated perspective view of ~
the wrap being folded around the sterile article. ~-
Figure 3 is an elevated perspective view of
the first folded tube showing how the side regions are ~-
to be folded.
Figure 4 is an enlarged, elevated, perspective
view of a wrapped sterile article.
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Figure 5 is a top plan view of another
embodiment of a wrapped sterile product of the present
invention.
Figure 6 is a bottom plan view of the wrapped -
sterile articles shown in Figures 4 and 5.
~igure 7 is an enlarged, cut away, elevated -
perspective view of the first folded tube shown in
Figure 3 in the process of being unfolded. ,~
DETAILED DESCRIPTION OF THE INVENTION
Referring to the drawings wherein like ~-
reference characters are utilized for like parts ;~-
throughout the several views, there is illustrated in
Figure 1 a product 20 to be wrapped with a sheet 22 --
which preferably is rectangular. The sheet 22 may be -`
15 made of any flexible sheet material including film, -
tissue, paper, or woven or nonwoven fabric.
As used herein the term "fold" describes the p~
act of producing a connection between two generally
flat panels not in the same plane including bending t-'
20 a sheet composed of at least two integrally connected -
panels, and securing with adhesive or by heat sealing --
two separate panels at an angle with respect to one
another. The term "fold line" as used herein denotes
the line of connection between the two panels in --
25 different planes. In general it is preferred that -
all folds herein be rectangular folds produced by
bending an integral sheet since such folds are easily
accomplished by automated machinery. '~
Sheet 22 has an upper edge 24, a lower edge ~-
26 and side edges 28. A portion of the sheet adjacent
upper edge 24 is folded, preferably by a rectangular
fold, along a fold line 30 to form unwrapplng flap 32. ~-
A portion of sheet 22 adjacent lower edge 26 is folded,
preferably by a rectangular fold, towards unwrapping --
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flap 32, along fold line 34 to form a protective flap
36. The fold lines 30 and 34 together with side edges l~:
28 define main panel 38 having a top edge 40 corres~
ponding to fold line 30 and a bottom edge 42 correspond- .-
5 ing to fold line 34. As shown in Figure 1 the unwrapping --.
flap 32 is then defined as the portion of sheet 22 `.
between top edge 40, side edges 28 and upper edge 24. ... --
The protective flap 36 is defined as the portion of --
sheet 22 between side edges 28, lower edge 26 and bottom
10 edge 42. Unwrapping flap 32 and protective flap 36
- both lie on the side of main panel 38 not touching the ir
product 20. t
: In Figure 2 the sheet 22 is shown about to --
envelop product 20 centered between side edges 28 on ...
15 main panel 38 but located slightly closer to bottom .
edge 42 than to top edge 40. The sheet is first folded .
around the product 20 by a fold 46, preferably a
rectangular fold, shown already completed and indicated --
by an arrow in Figure 2, around fold line 48, preferably t--
parallel to bottom edge 42 of main panel 38. Then a
fold 50, preferably a rectangular fold, shown partially r,,~
completed with the direction of the fold indicated by
an arrow in Figure 2, is made around fold line 52,
preferably parallel to top edge 40 of main panel 38.
25 When the product 20 is rectangular as is the one shown .-
in the figures, each fold line 48 and 52 is adjacent and .~
parallel to an edge of the product 20. The fold 50 F .
around fold line 52 creates a doubled panel 54, shown
in Figure 3, situated over the product 20. The panel '--
30 54 extends from the top edge 40 of the main panel 38 t::::
to upper exterior edge 56 created by the fold 50 around '--
- fold line 52 and includes a portion of flap 32 and a
portion of main panel.38. Similarly the fold 46 around --.
fold line 48 creates a fourth panel 58 atop the product
35 20. The fourth panel 58 extends from the bottom edge 42 .
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- of the main panel 38 to the edge 60 created by the
fold 46 around fold line 48 but does not include flap
36. Together fold lines 48 and 52 define a bottom panel 61
between them, which is a part of main panel 38 and serves
5 to cover the lower side of the product 20. The folds ~.`
46 and 50 are both inward folds in that they progress -:
toward the product 20 while the folds forming unwrapping -
flap 32 and protective flap 36 are conversely outward t
folds since the respective flaps-32 and 36 are directed
10 away from the product 20. i:
: The first folded tube 62 which results is ~
shown in Figure 3. It can be seen that doubled panel i--
54 is situated partially overlapping fourth panel 58
and completely covering protective flap 36. Alterna- ---
15 tively the fourth panel 58 could be folded atop doubled --
panel 54. It can be seen that the unwrapping flap 32 ... -`
has been divided by the fold 50 around fold line 52
into second panel 64 which is situated over the product
20 and third panel 66 situated under product 20 facing
20 bottom panel 61. Second panel 64 is defined as the '~
region between side edges 28, upper exterior edge 56
or fold line 52 and top edge 40. Third panel 66 is .---
defined by side edges 28, upper exterior edge 56 or -`
fold line 52 and upper edge 24 of sheet 22. Doubled --
panel 54 is made up of first panel 67 and second panel
64. First panel 67, identical in size to second panel --
64, lies between product 20 and second panel 64 which
completely overlaps first panel 67. First panel 67,
which is a part of main panel 38, is bounded by bottom ~
30 panel 61 a. upper exterior edge 56 and by the second ~-
panel 64 at top edge 40 of main panel 38. Thus bottom
panel 61 is connected to first panel 67 which is inwardly -`
folded and connected to second panel 64, outwardly -"
folded and, in turn, connected to third panel 66. ~
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The preferred relative sizes of the panels,
flaps, and regions which make up the first folded tube
62 with respect to the product 20 can be gauged from
Figure 1. In Figure 1 the width W, the dimension per-
pendicular to fold line 52, and length L, the dimensionparallel to fold line 52, of the product 20 are shown.
It can be seen that the third pane' 66 of unwrapping
flap 32 is of a length equal to about one quarter of ~--
the width of the product 20 or conveniently from about 2
to about 15 centimeters, while first panel 67 and second
panel 64 cover slightly more than half the width of the '~
product 20. The protective flap 36 on the other hand '--~
is much shorter and, in general, may conveniently be
approximately 1 to 4 centimeters in length. --
It can be seen in Figures 1 and 2 that a side --
region 68 extends beyond each lateral edge 70 of the -
product. Preferably each side region 68 extends
a distance of slightly more than one half of the length
to a distance equal to the length of the product 20 so
that side regions 68 are of sufficient length to overlap
one another atop the product 20. In an alternate t--
embodiment shown in Figure 5 side regions 68 extend -~
beyond the lateral edges 70 of the product a distance ---
from one fifth to one half of the length of the product, --
25 most preferably extending a distance approximately one ~-
quarter of the length of the product beyond each edge 10. --
The folding of the sheet 22 is completed by
folding side regions 68 inwardly on top of the product
around fold lines 72, preferably by rectangular folds F~
30 parallel to the side edges 28 of sheet 22, as indicated l~
by arrows in Figure 3. When the product 20 is
rectangular, as pictured, each fold line 72 is parallel -
to and adjacent an edge 70 of product 20. Since the
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regions 68 substantially overlap one another when -
folded as shown in Figure 4, no securement of the
regions 68 to the rest of the wrap is normally
necessary since the weight of the regions 68 tends to
5 maintain them in position. In the alternate embodi- !
ment shown in Figure 5, after folding, each side region
68 is secured to second panel 64 of the sheet by a --
tape strip 76. Alternatively, releasable glue spots ,--
(not shown) can be used between second panel 64 and .--
10 each side region 68 instead of tape strips 76. ~--
Finished rectangularly wrapped products are ~-
shown in Figures 4 and 5. Except for the length and ~ -
method of securing the regions 68, the products
pictured in Figures 4 and 5 are identical. Figure 6
shows the underside (which is identical for the embodi-
ments shown in Figures 4 and 5) of the folded sheet --
22 having third panel 66 of unwrapping flap 32 unattached.
While the rectangular folding and sizing of the regions
68 shown in either Figure 4 or 5 is preferred, any
20 conventional method may be used to fold and attach '~
the side regions 68. l--
The wrapped sterile product may in turn be '~
enclosed within still another package which preferably -
is a sealed plastic bag. After the bag containing the --
wrapped product is subjected to sterilization, the
contents are ready for use. -
The sheet 22 can be unwrapped without j-
contamination by a surgical assistant who need not
be surgically sterile. First, tape strips 76 if
30 present are broken and side regions 68 are returned ---
by the outward folds indicated by arrows in Figure 5, -~
around fold lines 72, to the position shown in Figure -
3 which represents the first folded tube 62. By graspinq
each side region 68 over fourth panel 58 when outwardly
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140
folding the side regions 68, the unwrapper can avoid .
ever reaching into the sterile field of the product 20.
As shown in Figure 7, the party unfolding
the wrap then supports the first folded tube 62 between
5 the thumb and forefinger (not shown) of one hand &0 .
clamping the product 20 between fourth panel 58 and .~
bottom panel 61. The first folded tube 62 is then --
dismantled by reaching under the first folded tube 62
with the other hand indicated as 82 and grasping third r~
panel 66 between the thumb and foreflnger (not shown).
The third panel 66 is pulled toward the unwrapper's ,~
body as indicated by the arrow 84 in Figure 7. This .
pulling force is transmitted by third panel 66 to
second panel 64 to first panel 67 causing doubled panel
15 54 to rotate outwardly around fold line 52 or edge - -~
49 of product 20, effectively reversing fold 50, as
indicated by arrow 86. The doubled panel 54 falls --
below the supported product 20 which now is allowed to -.
slide out on to a sterile surface from between fourth
panel 58 and bottom panel 61 by tilting the far end of
the product downwardly and loosening the grip of hand !--~
80. The unwrapper is left holding the sheet 22 in hand
80. Since a sterile surface is not exposed beneath . -
panel 58, a sterile field need not be maintained over
fourth panel 58; therefore, the region abcve panel 58
serves as a convenient space for grasping and unfolding :~
side regions 68. The product 20 then can be unfolded --
and used by sterile personnel without having been .
contaminated by being touched or having its sterile
30 field violated during unwrapping. :~
ln an alternate method not illustrated, the .
wrapped product 20 is grasped with the hand 80 rotated
- so that the thumb is on the underside touching bottom
panel 61 and the forefinger is on the upper side -
35 touching fourth panel 58. The end of the forefinger of .~
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hand 80 is then nestled between protective flap 36 ,-
and fourth panel 58, the flap 36 serving as a stop to
prevent accidental contact with the product 20 by the
forefinger. -
1 5 While particular embodiments of the present
; invention have been illustrated and described, it will
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' be obvious to those skilled in the art that various -
changes and modifications can be made without departing
from the spirit and scope of the invention and it is
intended to cover, in the appended claims, all such
modifications that are within the scope of this
t--
invention.
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